It's useful to have the reset status of the SoC printed out during reset
(e.g. to learn whether the reset was caused by software or a watchdog).
As a first step to implement this, add a get_status method to the
sysreset class, which enables the caller to get printable information
about the reset status (akin to get_desc in the CPU uclass).
Reviewed-by: Simon Glass <s...@chromium.org>
Signed-off-by: Mario Six <mario....@gdsys.cc>
---
v2 -> v3:
No changes
v1 -> v2:
New in v2
---
drivers/sysreset/sysreset-uclass.c | 10 ++++++++++
include/sysreset.h | 17 +++++++++++++++++
2 files changed, 27 insertions(+)
diff --git a/drivers/sysreset/sysreset-uclass.c
b/drivers/sysreset/sysreset-uclass.c
index 7e06c3c90a7..de0c0aadbd9 100644
--- a/drivers/sysreset/sysreset-uclass.c
+++ b/drivers/sysreset/sysreset-uclass.c
@@ -24,6 +24,16 @@ int sysreset_request(struct udevice *dev, enum sysreset_t
type)
return ops->request(dev, type);
}
+int sysreset_get_status(struct udevice *dev, char *buf, int size)
+{
+ struct sysreset_ops *ops = sysreset_get_ops(dev);
+
+ if (!ops->get_status)
+ return -ENOSYS;
+
+ return ops->get_status(dev, buf, size);
+}
+
int sysreset_walk(enum sysreset_t type)
{
struct udevice *dev;
diff --git a/include/sysreset.h b/include/sysreset.h
index 81318bdbf5d..a5c0b74a473 100644
--- a/include/sysreset.h
+++ b/include/sysreset.h
@@ -28,6 +28,14 @@ struct sysreset_ops {
* (in which case this method will not actually return)
*/
int (*request)(struct udevice *dev, enum sysreset_t type);
+ /**
+ * get_status() - get printable reset status information
+ *
+ * @buf: Buffer to receive the textual reset information
+ * @size: Size of the passed buffer
+ * @return 0 if OK, -ve on error
+ */
+ int (*get_status)(struct udevice *dev, char *buf, int size);
};
#define sysreset_get_ops(dev) ((struct sysreset_ops
*)(dev)->driver->ops)
@@ -41,6 +49,15 @@ struct sysreset_ops {
int sysreset_request(struct udevice *dev, enum sysreset_t type);
/**
+ * get_status() - get printable reset status information
+ *
+ * @buf: Buffer to receive the textual reset information
+ * @size: Size of the passed buffer
+ * @return 0 if OK, -ve on error
+ */
+int sysreset_get_status(struct udevice *dev, char *buf, int size);
+
+/**
* sysreset_walk() - cause a system reset
*
* This works through the available sysreset devices until it finds one that
can
--
2.11.0
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